162173 Ryugu (1999 JU3)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1910626253 ± 2.00e+00
Semi-major axis (a)1.1909211747 AU ± 3.00e+00
Inclination (i)5.86654965° ± 4.00e+00
Long. of Asc. Node (Ω)251.29160345° ± 5.00e+00
Arg. of Perihelion (ω)211.61670373° ± 6.00e+00
Mean Anomaly (M)270.65926628° ± 7.56e-06
Mean Motion (n)0.7583815353°/day ± 2.87e+00
Perihelion dist (q)0.96338065 AU ± 3.40e+00
Aphelion dist (Q)1.41846170 AU ± 4.29e+00
Orbital Period1.29964436 yr ± 4.91e+00
NGA Modelr2
A21.49982929e-05 AU/d²
Physical Parameters
H (abs. magnitude)19.55
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-27
RMS Residual0.086″
Uncertainty0
Orbit TypeApollo
MOID0.000212 AU
Observations Used4741
Gaia Obs Used94
Oppositions7
Arc Total1986-2016
First Observation Used1999-05-10
Last Observation Used2025-07-23
Observations (7718)
Date Type RA Dec Mag Band Observatory
2020-09-29 09:47:55 C 23 41 33.95 +34 54 03.7 V T08
2020-09-29 09:56:57 C 23 41 33.00 +34 54 04.7 V T08
2020-09-29 10:01:36 C 23 41 32.54 +34 54 05.1 V T08
2020-09-29 10:17:13 C 23 41 30.96 +34 54 06.7 V T08
2020-10-01 07:59:20 C 23 37 30.794 +34 57 26.16 U F52
2020-10-01 08:12:24 C 23 37 29.437 +34 57 27.05 U F52
2020-10-01 08:25:25 C 23 37 28.086 +34 57 27.81 U F52
2020-10-01 08:38:30 C 23 37 26.711 +34 57 28.51 U F52
2020-10-01 10:38:49 C 23 37 14.10 +34 57 31.0 V T05
2020-10-01 10:40:09 C 23 37 13.96 +34 57 30.7 V T05
2020-10-01 10:44:55 C 23 37 13.47 +34 57 30.9 V T05
2020-10-01 10:54:11 C 23 37 12.51 +34 57 31.0 V T05
2020-10-01 10:58:56 C 23 37 12.02 +34 57 30.5 V T05
2020-10-01 11:43:36 C 23 37 07.40 +34 57 29.7 V T05
2020-10-01 11:44:55 C 23 37 07.32 +34 57 29.4 V T05
2020-10-03 00:34:41 C 23 33 51.55 +34 56 47.1 V W34
2020-10-03 00:43:26 C 23 33 50.66 +34 56 46.8 V W34
2020-10-03 00:52:42 C 23 33 49.73 +34 56 47.1 V W34
2020-10-03 01:01:12 C 23 33 48.87 +34 56 47.1 V W34
2020-10-03 10:00:40 C 23 32 56.20 +34 56 36.2 V T08
2020-10-03 10:08:11 C 23 32 55.40 +34 56 35.5 V T08
2020-10-03 10:15:53 C 23 32 54.58 +34 56 34.8 V T08
2020-10-03 10:16:33 C 23 32 54.50 +34 56 34.5 V T08
2020-10-03 10:21:12 C 23 32 54.00 +34 56 34.1 V T08
2020-10-03 10:30:05 C 23 32 53.06 +34 56 33.3 V T08
2020-10-03 10:31:27 C 23 32 52.91 +34 56 33.2 V T08
2020-10-03 11:17:32 C 23 32 48.074 +34 56 26.86 U F52
2020-10-03 11:19:16 C 23 32 47.84 +34 56 27.5 V T08
2020-10-03 11:35:01 C 23 32 46.235 +34 56 24.50 U F52
2020-10-03 11:52:31 C 23 32 44.409 +34 56 22.10 U F52
2020-10-03 12:10:02 C 23 32 42.596 +34 56 19.51 U F52
2020-10-03 21:34:01 C 23 31 54.40 +34 55 28.4 q Z36
2020-10-03 21:35:10 C 23 31 54.27 +34 55 27.3 q Z36
2020-10-03 21:36:19 C 23 31 54.16 +34 55 27.9 q Z36
2020-10-03 21:37:27 C 23 31 54.04 +34 55 27.6 q Z36
2020-10-03 21:38:34 C 23 31 53.90 +34 55 27.4 q Z36
2020-10-03 21:39:43 C 23 31 53.78 +34 55 27.3 q Z36
2020-10-03 21:40:52 C 23 31 53.68 +34 55 27.3 q Z36
2020-10-03 21:42:00 C 23 31 53.58 +34 55 27.7 q Z36
2020-10-03 21:43:09 C 23 31 53.46 +34 55 26.9 q Z36
2020-10-03 21:44:16 C 23 31 53.23 +34 55 26.7 q Z36
2020-10-03 21:45:25 C 23 31 53.25 +34 55 27.2 q Z36
2020-10-03 21:46:34 C 23 31 53.07 +34 55 27.0 q Z36
2020-10-03 21:47:42 C 23 31 52.99 +34 55 27.3 q Z36
2020-10-03 21:48:49 C 23 31 52.84 +34 55 27.1 q Z36
2020-10-03 21:49:58 C 23 31 52.71 +34 55 27.0 q Z36
2020-10-03 21:51:07 C 23 31 52.63 +34 55 27.1 q Z36
2020-10-03 21:52:14 C 23 31 52.48 +34 55 26.5 q Z36
2020-10-03 21:53:22 C 23 31 52.35 +34 55 26.5 q Z36
2020-10-03 21:54:31 C 23 31 52.17 +34 55 26.6 q Z36
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2020-12-12 03:00:00 70251762.49 2 us 8560 -14 -14
2020-12-18 01:10:00 64846561.92 2 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m)